Biology is the study of life – a four-letter word that connects you to a 4-billion-year-old family tree. The word "life" can be difficult to define, but a set of common characteristics helps biologists identify living things. In this episode of Crash Course Biology, you'll discover how all life is connected and why studying biology can help us better understand ourselves and our relationship with all living things.

Chapters:
Welcome to the intensive biology course! 00:00
Characteristics of life 2:14
Is a virus alive? 6:18 a.m.
Life beyond Earth 8:52
Biology and you 10:03
All life is connected 10:44
Review and credits 11:59

Sources: https://docs.google.com/document/d/1GLDtAXE6ekg4Chk2qN3TYbNt0pJbyaHqTqRd6QY8pd4/edit?uspsharing

This series was produced in collaboration with HHMI BioInteractive, which is committed to empowering educators and inspiring students with engaging, accessible, quality classroom resources. Visit https://BioInteractive.org/CrashCourse for more information.

Discover our Biology playlist here: https://www.youtube.com/playlist?listPL8dPuuaLjXtPW_ofbxdHNciuLoTRLPMgB

Watch this series in Spanish on our Crash Course en Español channel here: https://www.youtube.com/playlist?listPLkcbA0DkuFjWQZzjwF6w_gUrE_5_d3vd3

Crash Course Biology is hosted by Dr. Samuel Ramsey. Learn more about him here: https://www.drsammy.online/

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